Electric bell-ringer.



w. v, BERGEN el G. c. ooMBs. BLETB BELL RINGEB. APPLICATION FILED PB.5.41913.

1,1 1@,870 www@ Sepia 15S, wm

TTORPIEYS i' clear', and yeiact description.

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armste 'I Specificationl of Letters Patent. Pailemtqlpgn 115, 191MB Be it known that we,-W1IQL'1AM V. BERGEN and GRovER C. CoMBs, citizens of the United States, and residents of Hillsboro, in the county of Washingtonland State of Oregon,

" have invented va new and Im roved Electric owing is a full,

Ben-Ringer, @which the foi This intention relates to electric bell ringers of that type consisting ofa reciprocatory striking element or-hammer located in proximity to the bell ori-gong to-impinge upon the same, the device being especially `useful in connection with re yor other alarm'.y bells, church :'bellsand other signal' to vbe trans,

devices, where-thebell sound is mitted over 'great areas. y

The invention hasV for one of its objects to improve and simplify the construction and operation ofapparatus of this character so asto be reliable and eiiicient in use, com'- paratively inexpensive to manufacture and installed and designed so as to, obtain a highspeed of yreciprocation of they striking element.

Another object of the invention is the provision of av simple and effective automatic switch for opening and closing the circuits of the solenoid or magnet, whereby the strik- A ing element or hammer-willmove back and forth with greatv rapidity and at the same time impart a blov.7 of upon the bell.

- Another :object of the invention is to pro- Vide a solenoid and core which can operate in a magnetici'eld. of high frequency withoutg material heating of the parts.

`With these objects jin view, and others as will appear as the description proceeds, the invention comprises various novel features of constructionjand .arrangement of parts 5t); hammer or vstriking element at the end of its return stroke; Fig. 2 is a plan view.

which will be lmore fully described hereinafter and set forth with particularity in the claims appended hereto..

ln the accompanying. drawings, V,which illustrate one embodiment ,of the invention,

and wherein similar reerence characters are employed to'designate corresponding parts throughoutthe several views, Figure 1 isl a side view .of the apparatus, showing the thereof; Fig. 3 is a viewof the striking element with portions thereof 4`in section; and Fig., t; is an enlarged view et the switcln application area april t, 1913. serial no. 759,108.

Ain a horizontal plane. The heads 2 of the considerablel power lent showing the same in open position and just prior to being closed by the return movement of the hammer. y Referring to the drawings, 1 designates the supporting base of the apparatus, on which is mounted the solenoid or magnet A, that is inthe form of a spool through which passes thestriking element or hammer B that is mountedto reciprocate preferably magnet are. preferably 'of copper or other non-magnetic material andhave their bases v3 fastened to the support 1, and on the heads are mounted anti-friction or bearing rollers 4, that slidably support the reciprocatory hammer B. The magnet or solenoid is composed of two windings or sections 5 and 6, either one or both of which may be 'oonnected in circuit, according to the magnetic. power desired or the nature of thesource ofcurrent supply. In order to prevent eddy currents from flowing around the heads 2, which are annular in form, each lhead has a radial slot or split 7 ThehammerwB is composed of a tubular body 8 filled with longitudinal strips or laminas 9 of iron or other magnetic material, and fastened to one end of the tube 8 is a striking head 10, and at the other end a weightl 11 to give inertia tothe element in moving on 4itsy striking rents in the core formed by the reciprocatory -element B, and the outer tube 8 isl split longitudinally, as shown at 12, Fig. 2, to prevent heating by eddy currents. The

magnet or solenoid A is employed to move the hammer on its striking stroke, but

springs 13 serve to return the hammer. These springs 13 are disposed at opposite sides of the magnet A and are of the helical extension type. The forward ends of the rear ends of the springs are anchored at 15 on the rear head of the. magnet. As the sprino's are connected with arms or equiva devices 14C on the hammerhead, andl the y the return movement of the striking element a st id bufn spring 16 is arranged on aV support or a utment 17 at the rear endyof the basel, and this humus; spring' is d isposed in line .with the weighted end of the hammer, sc as to be engaged by such en d l' near the limit of the return stroke.

The circuit of theelectro-magnet can be closed in rapid. succession where the striking 1s to be done automatically,'or it may,

be closed--by Switches located. at various sta tions from which the bell is to 'be controlled.

For instance, when the bell is used for fire' alarms the switches may be arranged in a fire engine' house, police station, telephone exchangel station, or other suitably desig-- nated place, and by opening and closing the circuit at predetermined intervals, acv cording to some code, the bell can be sounded to give a signal indicative of the loca-- the contacts 19 and 20, is carried by the `arm` 21 of a lever Z fulcrumed at 22 on the base 1, the said level having an arm 23. which 24 projecting laterally from such element.

.lever to the right an vextends upwardly toward the hammer'ele ment B, so yas to be in the path of a finger (,-operating with the lever Z is a latch 25 pivoted `at 26EL on the base and extending upwardly into the path of v the switch-actual?? ing inger 24.- This latch 25 has a shoulder 26 vthat is 'adapted to engage under the-tip 27 of the contact-carrying arm 2 1 after the vswitch has been opened by the iinger 24. striking the arm 23 of the lever Z, and to bring about this action a spring 28 is con-A nected with the arm 21 of the lever Z, and

with the latch 25 pulling the latter toward the -said arm.

In operation, ,let it be assumed that the hammer element B is moving to the right,

Fig.- 4, 'under the power of the springs, 13; the upper end of the latch 25 is just about to be struck by the finger 24, and as soon as the latch is struck the shoulder'26 of the latch is released from the tip 27 of the lever' Z, so that the s ring 28 will pull the d cause the contact 18 to bridge the contacts 19 and 20, the parts being nowin the position shown Vin Fig. 1. The lcircuit of the magnet is accordingly closed by the switch and the magnetic attraction on the hammer element or core will cause the latter to immediately move to the left, allowing the latch/to come into engagement with the end surface of, the tip 27 ofthe lever arm 21,'but the circuit` will remain closed until the finger 24 strikes. the lever arm 23, thereby raising the 'arm 21 to separate-the contact 18 fromtlie contacts 19 aud20. During this'openingmovement of in one direction,

'member to hold the same theswitch a point isn'ally reached where the shoulder 26, can snap undervv .the 1:19:27

ofthe contact-carrying arm21'. The-'circuit being thus brokenv the hammer element B .immediately yreturns and again closes thc circuit by the switch. By this arrangement a high speed of reciprocation of the hammer element can be obtained, .and in actualpractice an apparatus of approximately the proportions shown and three feet in length used in connection with an eight'hundredl pound bell produces a-I sound capable of carrying about two miles in foggy weather.

To prevent turning of the hammer elemeut B the same is provided with a laterallyextending member 30 at its rear end, which moves back and forth in a slotted guide 31 mounted on the base 1 at the 4side of the hammer element opposite froni'the switch. By means of this guide31the finger 24 that controls the switch will be maintained in fixed relation to the lever Z and latch 25.

From the foregoing description taken in 4connection with the accompanying drawings, the advantages of the method of.o eration and of the a para-tus shown W1ll be readily understood y those' skilled in the art to which the invention appertains, and while" We have described the Iapparatus which we now bodiment thereof, we desire to have it understood that the apparatus 'shownis merely illustrative,

and thatsuch .changes may4 be made when desired as are within the scope of the appended claims.

Having thus described our invention, we claim as new and desire to secure by Let'f ters Patent: f

1. A bell ringer comprising an electromagnet, a hammer element actuated thereby means for moving 'the hammer element on its return stroke, 'a circuit -for the el'eetro-magnet, a switch for the said circuit including a'movalble member, means on the hammer element for engaging -the movable member of the switch to open the circuit, and a latch for engaging the switch m open circuit position during the return stroke 'of the v hammer element and released from the movable member of the switchby the said means on the hammer element to permit the circuit to close, 4'said means bein disposed and movable between .the movab e member andthelatch. f

2. A bell ringer comprising anelectromagnet, a hammer element actuated there,-

by in one direction,'means for movin vthe hammer element on `its Areturn stro'e, a circuit for the electro-magnet, a switch for the said circuit including a movable member, means on the hammer element for engaging the movable member of theswitch to-o en the circuit, alatchfor engaging theswitch" member to hold? the saine" m open circuit hammer element and released from the movable member lof the switch bythe hammer Velement to permit the circuit to close, and a spring connected with the latch and with the movable membero Athe switch to maintain the switch closed during the striking stroke of the hammer element, and to maintain the latch engaged with the movable member of the switch during the major part of the return stroke of the -hammer element.

3.,v A bell ringer comprising a reciprocatory hammer element, electrical means for moving the same on the striking stroke, a switch including a contactcarrying lever, a latch arranged to hold the lever in open circuit position, a member on the element to engage the lever at the forward end of the striking stroke, to openl the circuit and tos-trike the latch at the rear end of the return stroke to release the latch from'the' lever, and a l guiding device for preventin the hammer element from turning, where y said mem.- ber on the hammer element 1s mamtamed in operative relation vvith the lever and latc 4. A bell ringer comprising a magnet, a hammer elementoperated thereby, a switch controlling the circuit of the magnet and including a movable element, a device carried bythe hammer. element .to impart a' blow to the said movable element o the switch for quickly opening the same, and l a latch disposed in the path of the device to be released thereby and operatively con` nected .with the movable element of the switch to engage with and hold such element in open circuit position iduring the major portion of the returnstroke of theihammer element.

In testimony whereo We have signed our names to this specification in the presence of 'tWo subscribing Witnesses..

WILLAM VREELAND BERGEN. GROVER CLEVEMND CUWRS.

Witnesses:

GEO. R.- BAGLEY, WM. G. Hann. 

